Transparent form
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Transparensy
{
/// <summary>
/// Summary description for Transparensy.
/// </summary>
public class Transparensy : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Transparensy()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
this.Text = "Transparency";
//this.Opacity = 0.5;
//this.TransparencyKey = System.Drawing.Color.Yellow;
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
//
// Transparensy
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(248, 78);
this.Name = "Transparensy";
this.Text = "Transparensy";
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Transparensy());
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g;
g = Graphics.FromHwnd(this.Handle);
g.FillRectangle(new SolidBrush(Color.Red), 10, 10, 210, 50);
// Five yellow squares with different alpha values
Rectangle r = new Rectangle(40, 20, 30, 30);
Color c = Color.FromArgb(255, 255, 255, 0);
g.FillRectangle(new SolidBrush(c), r);
r.Offset(30, 0);
c = Color.FromArgb(200, 255, 255, 0);
g.FillRectangle(new SolidBrush(c), r);
r.Offset(30, 0);
c = Color.FromArgb(150, 255, 255, 0);
g.FillRectangle(new SolidBrush(c), r);
r.Offset(30, 0);
c = Color.FromArgb(100, 255, 255, 0);
g.FillRectangle(new SolidBrush(c), r);
r.Offset(30, 0);
c = Color.FromArgb(50, 255, 255, 0);
g.FillRectangle(new SolidBrush(c), r);
g.Dispose();
}
}
}
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